Adjustable bed frame



FIG. 1 is a top plan view of an adjustable bed frame according to my design in a first retracted state;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top, right, front perspective view thereof;

FIG. 7 is a top plan view thereof in an extended state;

FIG. 8 is a bottom plan view thereof; and,

FIG. 9 is a front elevation view thereof.

The broken lines shown in the figures illustrate portions of the adjustable bed frame that form no part of the claimed design. 

CLAIM The ornamental design for an adjustable bed frame, as shown and described. 